JPH0719624Y2 - Mold changer - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Object of the Invention] (Industrial field of application) The present invention relates to a mold exchanging device used for exchanging a lower mold and an upper mold, such as a forging press.

(Prior art) In a vertical press used for forging etc., a hand lifter, an electric lifter, a forklift, etc. are used when exchanging the lower die and the upper die, but it is easy to exchange a die of about 50 kg. A hand lifter is used.

Conventionally, the lower die replacement work and the upper die replacement work have been performed separately. For example, when exchanging the lower mold, the hand lifter is moved forward so that the fork of the lifter enters the pressing device, and after holding the lower mold by the fork, the lifter is retracted and moved to the storage location of the mold. Also, after holding a new die on the fork and moving it again to the pressing device, the lower die is set in the pressing device.

When exchanging the upper mold, a series of operations similar to those at the time of exchanging the lower mold is repeated.

(Problems to be solved by the invention) As described above, conventionally, there is a problem that the work efficiency is poor because the upper mold removing work and the lower mold removing work are performed separately. In the case of manually moving the lifter like a hand lifter, moving the lifter many times while holding the lower mold or the upper mold, which is a heavy object, requires a great deal of labor and a heavy burden on the worker. It was

Therefore, an object of the present invention is to provide a mold exchanging device capable of efficiently exchanging an upper mold and a lower mold.

[Structure of the Invention] (Means for Solving the Problems) The device of the present invention developed to achieve the above-mentioned object is a movable base frame having wheels, and a vertical support frame provided on the base frame. An elevating body which is provided on the support frame so as to be able to move up and down and includes a horizontally extending fork; a hanging hook which is provided on the fork and is detachable from a lower hanging metal fitting; and an upper part of the hanging hook. And an upper die mounting table provided on the fork.

(Operation) When the lower die and the upper die are taken out from the pressing device by using the die exchanging device of the present invention, the die exchanging device is advanced toward the pressing device and a fork is placed between the lower die and the upper die. To enter. Then, the hanging hook of the fork is hooked on the hanging metal fitting provided on the lower die, and the fork is lifted to lift the lower die, and the upper die is slightly lifted by the upper die mounting table provided on the fork. Then, the mold exchanging device is retracted while maintaining the height of the fork. By doing so, the lower mold and the upper mold held by the fork can be taken out together with the fork from the inside of the pressing device. When assembling the lower die and the upper die into the press machine, the procedure reverse to the above is performed.

(Embodiment) An embodiment of the present invention will be described below with reference to FIGS. 1 to 10.

FIG. 4 shows a part of the press device 1 for cold forging. The press machine 1 includes a lower mold assembly 2 and an upper mold assembly 3. The upper die assembly 3 is adapted to be driven up and down by a press drive mechanism (not shown).

The lower die assembly 2 includes a lower die mounting jig 5, a lower pressure plate 6, and a lower die 7 such as a die. The lower pressure plate 6 is
It is fixed to the lower die mounting jig 5 by the tightening plate 8. The lower die 7 is fitted into the recess 9 provided in the lower pressure plate 6, and is fixed to the lower pressure plate 6 by a clamp mechanism 10 using a bolt or the like as an example of a clamping means. Lower mold 7
Can be taken out from the recess 9 of the lower pressure plate 6 by removing the clamp mechanism 10. Clamping mechanism 10 in the illustrated example
Although a bolt is used, a structure in which the lower mold 7 is fixed by a hydraulic cylinder, a wedge member or the like instead of the bolt may be used. A pair of arm-shaped hanging fittings 11 extending in the horizontal direction are provided on both left and right sides of the lower mold 7.

The upper die assembly 3 includes an upper die mounting jig 15, an upper pressure plate 16, a first clamping plate 17, an upper die 18 such as a punch, and an adjusting ring 19.
And a second tightening plate 20 and the like.

The first tightening plate 17 is fixed to the lower surface side of the upper die mounting jig 15 by a fixing member 21 such as a bolt as an example of fixing means. Moreover, this first tightening plate 17
As shown in FIG. 6 and the like, when the fixing member 21 is loosened, a certain amount of gap 22 is formed between the fixing member 21 and the upper die mounting jig 15. That is, the first tightening plate 17 can move up and down within a certain stroke range in the vertical direction. Instead of using bolts, the fixing member 21 may employ a mechanism for clamping the tightening plate 17 with a hydraulic cylinder or the like.

As shown in FIG. 5, the first tightening plate 17 has a generally horseshoe shape in a plan view. That is, the tightening plate 17 is provided with a notch 26 having an opening 25 on one end side (front side of the press device 1). A stepped supporting edge portion 27 is provided on the periphery of the notch 26. This notch
The second tightening plate 20 fitted to the 26 is inserted by sliding the second tightening plate 20 horizontally from the opening 25 side so as to be placed on the support edge 27 and fitted to the notch 26. Is supported by the support edge 27. Therefore, the notch 26
The shape of corresponds to the shape of the second tightening plate 20.

A circular hole 28 is provided in the second tightening plate 20, and the upper mold 18 is inserted into the hole 28 from above. Since there are several sizes of the upper mold 18, a plurality of kinds of tightening plates 20 having holes 28 of a size corresponding to the upper mold 18 are prepared, and one selected according to the size of the upper mold 18 is used. .

The lower die 7 and the upper die 18 can be exchanged by the die exchanging device 40 shown in FIGS. 1 and 2. This mold exchanging device 40 is a modification of an existing hydraulic hand lifter, and includes a base frame 43 having wheels 41 and 42, and a support frame 44 extending in the vertical direction of the base frame 43.
And the lifting body that is held up and down on this column frame 44
45, a hydraulic cylinder 46 for raising the elevating body 45, an operation lever 47, a balance weight 48 and the like.

The elevating body 45 has a pair of left and right forks 51 extending in the front-rear direction. A pair of left and right suspension hooks 52 facing forward are provided near the tip of the fork 51. Hanging hook 52
Project from the lower surface side of the fork 51. Hanging hook 52
Can be hooked on the hanging metal fitting 11 of the lower mold 7 described above.

A mold changing jig 55 as shown in FIG. 3 is mounted on the upper surface side of the fork 51. The mold changing jig 55 includes a pair of left and right upper die mounting bases 56 using angle materials and the like.
A connecting member 57 for connecting 56 is provided. A hole 58 is provided at the base of the upper die mounting table 56. The hole 58 is adapted to be fitted into a positioning projection 59 projectingly provided at a predetermined position on the upper surface of the fork 51. A protrusion 60 for positioning is also provided at the center of the connecting member 57 in the longitudinal direction. This protrusion 60 is the second
It is adapted to fit into a hole 61 provided in the tightening plate 20. The distance L between the upper die mounting tables 56, 56 is smaller than the width W of the notch 26 and larger than the outer diameter of the upper die 18.

The lower mold 7 and the upper mold 18 described above are
Detachment work for the press device 1 is performed.

As shown in FIG. 4, the lower mold 7 assembled to the lower mold assembly 2 and the upper mold 18 assembled to the upper mold assembly 3.
In order to take it out, the clamp mechanism 10 is removed, and the fixing member 21 is loosened as shown in FIG. A gap (22) is formed between it and the tightening plate (17).

Then, by moving the mold exchanging device 40 toward the pressing device 1, the fork 51 is inserted between the lower mold 7 and the upper mold 18 as shown in FIG. Stop at a position where it can be engaged with.

After that, as shown in FIG. 7, by raising the fork 51, the hanging hook 52 is hooked on the hanging metal fitting 11 and the lower mold 7 is raised, and the lower mold 7 is taken out from the recess 9 of the lower pressure plate 6.

Raise the fork 51 further, and as shown in FIG.
The upper surface of the upper die mounting table 56 is abutted against the lower surface of the second tightening plate 20, and the second tightening plate 20 is lifted. By doing so, the adjusting ring 19 and the upper mold 18 are raised together with the second tightening plate 20, and the second tightening plate 20, the adjusting ring 19 and the upper mold 18 can be taken out integrally. Become.

In this state, when the mold exchanging device 40 is retracted in the direction of arrow R shown in FIG. 10, the lower die 7 suspended from the fork 51 and the upper die 18 mounted above the fork 51 are taken out. be able to. The lower mold 7 and the upper mold 18 that have been taken out are transported to a desired storage position by using the exchange device 40. After that, the replacement device 40 holding the new lower mold 7 and upper mold 18
By moving in the opposite direction to the above, a new lower die 7 and upper die 18 are assembled at predetermined positions in the press device 1 in the procedure opposite to that at the time of taking out the die, and the lower die 7 and the upper die 18 are The replacement work is completed.

According to the present embodiment, the fork 51 of the mold exchanging device 40 is moved between the lower die 7 and the upper die 18 to raise the fork 51, and the lower die 7 and the upper die 18 are forked. Can be held at 51. The lower die 7 and the upper die 18 can be taken out at a time simply by retracting the die exchanging device 40 as it is, so that the labor of moving the exchanging device 40 can be done only once, and the lower die 7 and the upper die 18 can be removed. Exchange work can be performed quickly.

[Effect of the present invention] By using the mold exchanging device of the present invention, it is possible to efficiently attach and detach the lower die and the upper die to the press device,
It also reduces the labor required for workers to change dies.

[Brief description of drawings]

The drawings show one embodiment of the present invention. FIG. 1 is a side view of a mold changing device, FIG. 2 is a plan view of the mold changing device, FIG. 3 is a perspective view of a mold changing jig, and FIG. Is a vertical cross-sectional view of the cold forging press device, FIG. 5 is a perspective view showing the upper die and the clamping plate, and FIGS. 6 to 8 are views of the press device shown in FIG. FIG. 9 is a vertical cross-sectional view showing the state in the order of steps, and FIGS. 9 and 10 are side views of a part of the press device and the mold exchanging device showing the state at the time of exchanging the mold. 1 ... Pressing device, 2 ... Lower mold assembly, 3 ... Upper mold assembly, 7
… Lower mold, 11… Hanging fittings, 17… First tightening plate, 18… Upper mold,
20 ... Second tightening plate, 21 ... Fixing member, 25 ... Opening part, 26 ...
Notch, 40 ... Mold changing device, 41, 42 ... Wheel, 43 ... Base frame, 44 ... Strut frame, 45 ... Elevating body, 51 ... Fork, 52 ... Suspension hook, 55 ... Mold changing jig, 56 ... Top Mold mounting table.

Claims (1)

[Scope of utility model registration request] 1. An elevating body including a movable base frame having wheels, a vertical support frame provided on the base frame, and a fork that is vertically movable on the support frame and extends horizontally. And a hanging hook that is provided on the fork and can be engaged with and disengaged from a lower hanging metal fitting, and an upper die mounting table that is located above the hanging hook and that is provided on the fork. Mold changing device.